Usage of colon in titles

Colon

A colon is used to give emphasis, present dialogue, introduce lists or text, and clarify composition titles.
Emphasis—Capitalize the first word after the colon only if it is a proper noun or the start of a complete sentence. (She had one love: Western Michigan University.)
Dialogue—Write the speaker's name, followed by a colon and his or her statement. (Reporter: What is the Western Edge? Dunn: It is a strategic plan for promoting student success.)
Introduce lists, text or tabular material—Capitalize the first word after the colon only if it is a proper noun or the start of a complete sentence. (Our future is dependent on three things: sustainability, diversity, and enhancing our strength and health.)
Clarify the titles of books, lectures and other compositions—Use a colon in titles that express two parallel ideas. The words on either side of the colon should be able to stand on their own. (He wrote "Crisis Management by Apology: Corporate Response to Allegations of Wrongdoing.")

I have seen an English title and sentences like below,

< NASA: 10,000-year-old ice shelf to disappear by 2020 >

A massive 10,000-year-old Antarctic ice shelf will most likely disintegrate completely by 2020 due to global warming, a NASA study predicted. Scientists believe abnormally hot summers caused the ice shelf’s breakdown.
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And someone says that when colon is used in the title, the latter one is what NASA announced but I do not know where I could apply the explanation among the different usage of colon? Or is there some rule added to usage of colon nowadays?

What do you native English speakers think? Thank you so much as usual!